<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <meta name="author" content="wangbo">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>上机</title>
  <!-- 内部样式 -->
  <style>
    .red{
      color: red;
    }   
    .font35{
      font-size: 35px;
    }
  </style>
</head>
<body>
  <!-- 多类名的使用 -->
  <div class="red font35">刘德华</div>
 
</body>
</html>